Joseph julius sachs



UNITED STATES 7 PATENT OFFICE;

JOSEPH JULIUS SACHS, OF THE \VOODLAWNS, SUNBURY-UN-THAMES, COUNTY OF MIDDLESEX, ENGLAND.

PRODUCTION OF SURFACES FOR PRINTING, 8L0.

SPECIFICATION forming part of Letters Patent No. 274,519, dated March 27, 1883. Application tiled November 17, l882. (No specimens.) Patented in England March l0 1882,1(0. 1,166.

To all whom it may concern: V

Beit known that I, Josnrn Juuns Sirens, a subject. of the Empire of Austria, and now residing at. The \Vo'odlawns, Sunbury-on- Thames, county of Middlesex, England, have invented certain Improvements in the Production of Surfaces iorPrinting, Embossing, and other like purposes usefuland ornamental, of which the following is a specification.

This invention relates to the production of.

surfaces for printing or embossing and other like purposes.

The object of my invention is to produce surfaces whicharc engraved or etched,or which may, if desired, be raised from the surface of the plate, the design produced being obtained upon the printing-surface bythe use of some pattern having in it openings or holes through which the printingsurface is afi'ected.

The printingsurtace may consist of a' roller or a plate; but in this description I will take as an example aroller. The roller 1 first coat with a varnish or layer of some substance or material which will resist the action of the chemicals in' an etching or galvanic hath. When this resisting coating has been placed upon the roller or plate, and has become dry, I place upon it some sticky substance-- as, for instance, a solution of some gum, gelatine, starch, or the like-and while this sticky substance is wet I place around the roller the pattern, which may consist of any open fabric or material. When the pattern consists of indiarubber or similar elastic material it can be stretched around the roller, and in such case, if the material of the pattern will resist the bath, it is unnecessary to place any resisting coating upon the roller or plate, as the rubber or like material will cling with sufficient tightness to the roller or plate to prevent the etching solution or the galvanic bath frompene trating beneath the pattern, and will leaveonly the exposed portions of the roller or plate to he aii'ected by the bath. But, for example, suppose the pattern consists of a piece of lace. This material will not adhere, as will rubber, to the surface of the roller or plate, and consequently it becomes necessary to coat the roller, as first described. The adhesive material placed upon the resisting coating will cause the lace to adhere firmly to the roller. The

tern before the sticky or edhesive solution used to cause the pattern to adhere to the roller or plate is dry. it is not necessary, in the case of a. pattern formed from lace in the shape of a tube, for example, to make the said tube fit the roller with extreme tightness, for

the application of the sticky substance or material causes the lace to slightly contract, so that it will clasp the roller with the proper tightness.

I prefer the wet process just described,

though when materials like rubber are used for the pattern the dry process can be employed to advantage. As soon as theadhe' sive substance is dry and the pattern is firmly held upon the roller the portions of the roller exposed through the interstices of the pattern can be cleaned of the resisting coating. This can be done by hand with an instrument pointed like achisel, and when the resisting coating is removed or scraped away, and the bare popper or other surface is left, the roller is who placed in a bath of etching-liquid and slowly revolved therein, the result of which bath will he to eat away the exposed portions of the roller, while such portions as are protected by the resisting coating beneath the pattern will not he afiected, and in this way a printing-suri'acc will be obtained.

The most expeditious way of removing the resisting coatin g through the interstices of the pattern is to use the ordinary sand-blast process, provided the pattern is of such a kind as to enable it to resist the attrition of the particles of sand. Hand-tools--such as brushesmay be used with some forms of patterns, and will be found useful in removing the resisting coating through the interstices of the pattern.

When the roller is ready for etching, the pattern may be removed from its surface by soaking the roller in a liquid which will disfor printing.

solve the adhesive material used in causing the pattern to adhere to the roller, and this will obviate the destruction of the pattern, and also enable the operator to rectify any defects before etching.

The etching-bath which I prefer to use consists of a solution of perchloride ol' li'Oll flbollh 70 Tralle, which I find is the most suitable, although other baths may be used-for example, nitric acid and the like.

When the roller is sufficiently etched it is to heremoved from the bath, the resisting coating' cleaned off, and the roller will then be ready manner, and the portions exposed throughthe interstices of the pattern may have copper or other metal deposited on them by electro deposition. v

\rVhen it is desired to produce a rougher surface in the parts of the rollerintended to hold the ink or color, I place the roller, after it has been etched, in any electrotype-bath and deposit a thin film of metal over the surface of the roller. The roller is then polished, the rough metal film is thus removed from the outstanding parts, but, remains at the bottom of the etched portions, forming a rough surface, which holds color admirably. To produce, for example, say, pin-engraving, I take a mill covered with pin-engraving and run it over the roller or surface before commencing the process, and thus the Whole surface is covered To produce the reverse of this. efi'ect the roller may he prepared in the above with this engraving. I then proceed as before, and, when finished, I have as result a roller or surface the outstanding parts'ot' which print the pin-engraving,while the sunken parts print a solid pattern, thus giving beautiful effects. This is especially useful for printingoil-colorsas, for instance, for printing on oil-cloth.

What I desire to claim as my invention is- 1. The process herein described ofproduci n g printing-surlaces,wliich process consists in covering the surface of the roller or plate with a resisting coating, placing upon the surface of this roller or plate a pattern which is caused to adhere to the roller or plate by some sticky material or by its own elasticity, then removing the resisting material through the interstices of the pattern, and then forming a printing-surface, substantially as herein described. .4. The process herein described of producing a printing-surface having aground in imitation of tan-engraving upon the surface of a roller or plate by first covering the entire surface with a series of indentations, next covering the surface with a resisting coating, then placing upon the surface of the coating a pattern, then removing the resisting material through the pattern, and finally forming a printing-surface, as previously described.

JOSEPH JULIUS SACHS. \Vitnesses:

G. R. HAGON, ALFRED H. J ONES. 

